I found this, free utility to monitor your ADSL usage!

It supports the following ADSL ISP's:

adept
( at )lantic
axxess
baspnet
cheetah internet solutions
hyperlink
imagine
isoftnet
mweb
navi-9
openweb
saol
telkomsa.net
unilynx
webafrica
x-dsl

Download it: HERE

SOURCE: http://mybroadband.co.za/vb/showthread.php?t=24500

I've found it pretty useful!